Findings from Islamic Azad University Update Understanding of Environmental Clean Technologies (Optimization of proteases pretreatment on natural dyeing of wool using response surface methodology)
By a News Reporter-Staff News Editor at Life Science Weekly -- New research on Environmental Clean Technologies is the subject of a report. According to news reporting from Yazd, Iran, by NewsRx journalists, research stated, "Natural dyes and enzymes have attracted a lot of attention due to their non-hazardous nature. In this research, wool fabrics were pretreated with the commercial protease at different concentrations over various times."
The news correspondents obtained a quote from the research from Islamic Azad University, "The dyeing process was then carried out on the treated fabrics with the commercial madder and cochineal. Also, the central composite design analysis was used to design the relation between dye exhaustion and some properties of dyed wool including tensile strength, alkaline solubility, water drop absorption, and weight loss based on Design of Expert software. The response surface methodology was also applied to find the optimum conditions for the wool fabric pretreatment. The scanning electron microscopy was employed to indicate the influences of proteases on the fabric surface. The optimized proteases pretreatment on the wool surfaces has considerably improved the absorption of madder and cochineal and minimized the damage to appropriate physical properties. The adsorption kinetic of madder and cochineal on enzymatic wool fiber was fitted with a pseudo-second-order model. The rate of dyeing at different temperatures, as well as the values of standard affinity, entropy, and enthalpy, was calculated. The activation energy of dyeing with madder and cochineal at different temperatures are 23.79 and 30.96 kJ/mol, respectively, considering that these values are in the typical activation energy for physisorption. It was also found that wash, light, wet and dry rub fastness properties of the samples dyed along with protease have not changed significantly."
According to the news reporters, the research concluded: "This can be easily scaled up in the industry as a simple method using the commercial materials."
For more information on this research see: Optimization of proteases pretreatment on natural dyeing of wool using response surface methodology. Clean Technologies and Environmental Policy, 2014;16(6):1081-1093. Clean Technologies and Environmental Policy can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer - www.springer.com; Clean Technologies and Environmental Policy - www.springerlink.com/content/1618-954x/)
Our news journalists report that additional information may be obtained by contacting A. Nazari, Islamic Azad Univ, Yazd Branch, Dept. of Chem, Yazd, Iran. Additional authors for this research include M. Montazer, F. Afzali and A. Sheibani (see also Environmental Clean Technologies).
Keywords for this news article include: Yazd, Iran, Asia, Protease, Enzymes and Coenzymes, Environmental Clean Technologies
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